The BrewBurger — created by the Brewdog craft beer brewery and Honest Burgers— is a 150g patty topped with onions fried in IPA, plus a beef dripping barbecue reduction made from a 15 per cent stout aged in whisky barrels.

It is topped with Comté cheese and bacon “candied” in an amber ale, served in a glazed bun with pickles —and a bottle of ale on the side.

Sold for £15, the dish is said to be just under five per cent alcohol by volume and diners must show ID to prove they are over 18 if they want to order one.

It is estimated that eating one of the burgers is the equivalent of drinking a quarter-pint of beer.

“The patty is done the same and the Comté cheese is nutty, which works well with a wheaty, hoppy beer. The bulk of the alcohol comes through in the barbecue sauce. We wanted to use something that when it was reduced down still kept its alcoholic content.”

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'I missed ketchup'

A beer is normally served next to the burger, so would it work combining them?

Honest Burgers’ patty was delicious, but the barbecue dripping reduction and booze-infused onions heaped on top muted the flavours, which made the dish very heavy and rich.

The absence of ketchup and mustard meant there was nothing zesty to cut through everything. Afterwards, I felt like I’d drunk a few sips of beer. Selling London’s booziest burger might earn bragging rights, but I’ll have my beer in a glass.

The BrewBurger is on sale at all five Honest Burgers branches from March 3 for a month.

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Over a year ago, Miranda Bryant started a blog called WheatOut! with the aim of finding the capital's best culinary experiences for taste, fun and, obviously, gluten-free food. Here are her five favourite gluten-free brunches in London